package com.wngbms.aop.interceptor;

import com.wngbms.aop.staticproxy.EchoService;

public class ExpEchoService implements EchoService {


    @Override
    public String echo(String msg) throws NullPointerException {
        System.out.println(msg);
        int i = 9 / 0;
        return null;
    }
}
